Elevator-cage-door opener.



No. 810,169. PATBNTED JAN. 16, 1906.

E. & w. B. MURRAY.

ELEVATOR GAGE DOOR OPENER. APPLICATION FILED MAY 31.1905.

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WITNESSES: [/VVE/VTORS. 44 j Of/.

No. 810,169. PATENTED JAN. 16, 1906. E. 6: W. B. MURRAY.

ELEVATOR GAGE DOOR OPENER. APPLICATION FILED MAY 31.1905.

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Aitomey UNITED STATES PATENT UFFICE.

OF COLUMBIA.

ELEVATOR-CAGE-DOOR OPENER- Specification of Letters Patent.

Patented Jan. 16, 1906.

Application filed May 31, 1905. Serial No. 263,084.

To all whom it may concern.-

Be it known that we, EUGENE MURRAY and WILLIAM B. MURRAY, citizens ofthe United States, residing at Washington, in the District of Columbia,have invented certain new and useful Improvements in Elevator- Cage-DoorOpeners, of which the following is a specification.

()ur' invention relates to door-opening devices and to that particularclass used in connection with elevator well or shaft doors.

The object of our invention is to provide reliable means for openingelevator-well doors adapted to be operated by the ascending ordescending car.

It is a further object of our invention to provide means forunlockingthe well door adapted to be operated by the door-opening means.

It is a further object of our invention to provide means for preventingthe car from leaving a floor without closing the door if the same isopened.

Vith these and other object in view the present invention consists inthe combination and arrangement of parts, as will be hereinafter morefully described, shown in the accompanying drawings, and particularlypointed out in the appended claims.

In the drawings, Figure 1 is a sectional view of an elevatorcar andwell-door equipped with our device Fig. 2 is a view of the inside of awell-door. Fig. 3 is a view of the cam-plate attached to the car. Fig. 4is a detail sectional view of the cam-groove and the roller.

Referring to the drawings, in which like numerals of reference indicatecorresponding parts, 1 is an elevatorcar provided with anoperating-wheel 2. Beneath the car-floor 3 are secured mountings 4 and 5for rod 6 and bell-crank 7. One end of rod 6 is connected to a slidingmember 8, mounted in a socket 9, located in the framework of theelevator-car. To the outer end of member 8 is secured a plate 10,provided with a earn-groove. 11, having inwardly-disposed flanges 12 forpurposes which will be hereinafter described. Bell-crank 7 has one ofits arms connected to the end of rod 6 and its other arm connected withthe plunger 13, which passes up through the floor of the car. Theconnections just described are loose connections adapted to be adjustedto regulate the extent of movement of member 8. Springs 14 and 15 arearranged in connection with mounting 4 to normally hold the cam-plate 10close against the car.

Referring now to that portion of our device secured to the shaft anddoor, 16 is the door of an elevator well or shaft, and 17 the floorjoistforming part of the shaft. Secured to joist 17 by fulcrum 18 is a lever19, connected at its upper end by a link 20 to lock-releasing rod 21.The link 20 is secured to the door by a bolt passing through slot 20,provided in the link, said slot permitting a limited longitudinalmovement of the link. The rod 21 passes through the lock-casing andconnects with an arm 22, which operates to raise latch 23 out ofengagement with hook 24, secured to the wall of the well. A coilspring25, mounted on rod 21, presses against a collar on said rod to force itforward in order to keep the latch 23 normally in a locking posi tion.To the lower end of lever 19 a roller 26, provided with flanges 27, issecured by a bolt 28, as shown in Fig. 4.

The operation of our device is as follows: The elevator-car, ascendingor descending, will leave the welldoors undisturbed unless the operatorforces cam-plate 10 outward by pressing on plunger 13. When plun er 13is forced downward, the lower arm of bell-crank 7 forces the rod 6forward against the opposing force of springs 14 and 15. This forwardmovement of rod 6 pushes outward sliding member 8 and cam-plate 10 ismoved away from the car to the position shown in Fig. 1. As the carcontinues in its course the roller 26 is engaged by the cam-groove 11,which operates to drive said roller to the right, as viewed in Fig. 2,and with it lever 19, to which. it is attached. The first movement ofthe lever after the roller has been engaged by. the groove is lost bythe well-door through DiSTRICT slot 20, the result being that the latch23 is lifted by the rod 21 through link 20 before any pull is exerted onthe door. The camplate 10 is so located on the car that when the floorof the car is on a level with the floor supported by joist 17 the roller26 is at the end of its travel in one direction and the door is open andwhen the car moves either up or down the roller 26 is forced in theopposite direction and, the door is closed.

We have provided rod 21 with a slot 21, through which a pin passes toconnect it with arm 22, the object being to enable the latch 23 to beraised without operating the dooropening mechanism and for the furtherpurpose of allowing the latch to slide over hook 24 when pressure isexerted on rod 21 in the direction of the lock, as is the case when thedoor is being closed by cam-plate 10.

It will be observed that when once the roller 26 is engaged by thecam-groove it will retain the cam-plate 10 against lateral disengagementby the flanges 12 engaging with the flange 27 on the roller. Thisprevents the car from leaving the floor without closing the door.

Having thus described our invention, what we claim as novel, and desireto secure byLetters Patent, is

1. The combination with an elevator-car, of a laterally-movable memberwith a camgroove and flanges projecting over the same a door to theelevator-well; and means operating to open said door adapted to beengaged by the cam-groove, and held from lateral disengagement by theflanges.

2. The combination with an elevator-car of a movable cam carriedthereby; a welldoor, a lever having a fixed fulcrum connected to thedoor in the path of movement of the cam to be engaged thereby, means forpreventing accidental disengagement of the members, and means foroperating said cam.

3. The combination with an elevator-car, of a laterally-movable memberhaving a cam groove therein, of a lever having a fixed fulcrum andprovided with a member to engage said groove, means for preventingaccidental disengagement of the parts, door-releasing means operated bythe lever, and means for operating the cam.

4. The combination with an elevator-car, of a well-door and a pivotedlatch thereon, a rod connected to said latch, and a slotted linkconnected to the rod, a pin in the door located in the slot, anoperating-lever connected to the link, and means on the car adapted toengage said lever to release and open the door. I

5. The combination with an elevator-car, of a well-door and a pivotedlatch thereon, a

rod connected to said latch, and a slotted link connected to the rod, apin in the door located in the slot, an operating-lever connected to thelink; a cam member on the car and means on the operating-lever to engagesaid cam to release and open the door.

6. The combination With a Well-door and a lever connected to open thesame, of an elevator-car and a laterally-movable member to engage saidlever, an angular plunger integral with said member having bearings inthe car-frame, a connecting-rod attached to the plunger, and means tooperate said rod.

7. The combination with a well-door and a lever connected to release andopen the same, of an elevator-car and a laterally-movable member toengage said lever, an angular plunger integral with said member havingearings in the carframe, a connecting-rod attached to the plunger, aconnecting-rod, a bell-crank lever, and a depressiblefoot-plunger.

8. The combination with a well-door and a lever connected to release andopen the same, a roller on the lever; an elevator-car and alaterally-movable member having a camgroove therein to engage saidroller, a plunger integral with said member having bearings in thecarframe, a connecting-rod attached to the plunger, and means to operatesaid rod.

9. The combination with a well-door, of a lever connected to release andopen the same, a flanged roller on the lever, a laterallymovable memberadapted to engage said roller, said member having a cam-groove formedtherein, flanges overhanging said groove, a plunger on the member havingbearings in the car-frame, a connecting-rod attached to thg plunger, andmeans for operating said r0 In testimonv whereof We aflix our signaturesin presence of two witnesses.

EUGENE MURRAY. WILLIAM B. MURRAY.

Witnesses:

STANLEY C. VEIRs, ASHER TRAIN.

